(19)
(11) EP 0 328 583 A1

(12)

(43) Date of publication:
23.08.1989 Bulletin 1989/34

(21) Application number: 88906584.0

(22) Date of filing: 10.06.1988
(51) International Patent Classification (IPC): 
B22F 7/ 06( . )
B23P 5/ 00( . )
C04B 41/ 52( . )
C04B 41/ 87( . )
E21B 10/ 46( . )
E21B 10/ 567( . )
 B23D 61/ 04( . )
C04B 41/ 45( . )
C04B 41/ 81( . )
C04B 41/ 89( . )
E21B 10/ 56( . )
(86) International application number:
PCT/US1988/002037
(87) International publication number:
WO 1988/009826 (15.12.1988 Gazette 1988/27)
(84) Designated Contracting States:
BE DE FR GB IT NL SE

(30) Priority: 11.06.1987 US 19870061705
15.09.1987 US 19870095054

(71) Applicant: NORTON COMPANY
Worcester Massachusetts 01606 (US)

(72) Inventors:
  • CHEN, Sy-Hwa
    Salt Lake City, UT 84121 (US)
  • MERRILL, Leo
    Orem, UT 84059 (US)
  • BIGELOW, Louis, Kim
    Salt Lake City, UT 84124 (US)
  • SUNG, Chien-Min
    Sandy, UT 84070 (US)

(74) Representative: DIEHL GLAESER HILTL & PARTNER 
Patentanwälte Postfach 19 03 65
D-80603 München
D-80603 München (DE)

   


(54) IMPROVED COATED PCD ELEMENTS AND PRODUCTS AND METHODS